EP0704191B1 - Chirurgische Anordnung mit einem Fräser und einem Halter hierfür - Google Patents

Chirurgische Anordnung mit einem Fräser und einem Halter hierfür Download PDF

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Publication number
EP0704191B1
EP0704191B1 EP95810597A EP95810597A EP0704191B1 EP 0704191 B1 EP0704191 B1 EP 0704191B1 EP 95810597 A EP95810597 A EP 95810597A EP 95810597 A EP95810597 A EP 95810597A EP 0704191 B1 EP0704191 B1 EP 0704191B1
Authority
EP
European Patent Office
Prior art keywords
cutter
reamer
bayonet
milling cutter
holder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95810597A
Other languages
English (en)
French (fr)
Other versions
EP0704191A1 (de
Inventor
André Lechot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Greatbatch Medical SA
Original Assignee
Greatbatch Medical SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4244899&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0704191(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Greatbatch Medical SA filed Critical Greatbatch Medical SA
Publication of EP0704191A1 publication Critical patent/EP0704191A1/de
Application granted granted Critical
Publication of EP0704191B1 publication Critical patent/EP0704191B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1662—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body
    • A61B17/1664—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the hip
    • A61B17/1666—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the hip for the acetabulum
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1613—Component parts
    • A61B17/162—Chucks or tool parts which are to be held in a chuck
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30426—Bayonet coupling

Definitions

  • the invention relates to a cutter holder and cutter assembly intended for surgery in the field of implantation prostheses, comprising, on the one hand, a handle to which is attached a cutter head fitted with a device fixing bayonet type provided with means locking and on the other hand a shaped bur cap with radial rods, regularly distributed, integral with the inner edge of the cutter, intended to come to engage in notches of the bayonet.
  • Such a cutter / cutter holder assembly has already been marketed by the depositor.
  • the strawberry in the shape of a hemispherical cap is provided with three radial lugs on its inner edge, intended to come engage in the notches of the bayonet. These can be locked by lugs placed at the end a slide movable axially on the handle of the cutter holder and brought back against the bayonet by the action of a spring.
  • the lugs on the slide correspond holes in the bayonet, through which the lugs to close the bayonet notches when the slide is pressed against the bayonet. To open bayonet notches, just move it away enough the bayonet slide.
  • the cutter has a relatively low rigidity.
  • the pins having a limited length, a cutter head can only be used for milling cutters with well defined diameters located in a narrow range, which involves frequent assembly and disassembly of the head of the cutter holder during the use of different strawberries.
  • a milling tool of the same type, corresponding to the preamble of claim 1, is known from the document FR-A-2 281 095.
  • This tool is intended for shaping the acetabular cavity when replacing with a prosthesis total hip joint. It consists a strawberry which may have the shape of a hemisphere and a cutter head intended to close the lower part of the strawberry so that the particles of fabrics removed during the milling operation reaching in the inner cavity of the strawberry there retained until the end of the operation, and to be mounted on a training tree.
  • a single rod fixed by its two ends inside the cutter is provided for fixing the cutter to the cutter head. It cooperates, for example, with a fixing system bayonet type with which the cutter head is fitted.
  • This milling tool has good rigidity of the that during the milling effort the lower edge of the cutter is pressed against the cutter head, the rod giving it additional stability.
  • This tool has a significant drawback which is the risk of jamming inside the milling cutter during an operation. During a jam, the cutter does not planes more and therefore damages the bone.
  • Another disadvantage presented by this tool is that the cutter head can only be used with burs with a diameter well determined, which implies, as for the whole cutter holder / cutter already sold by the depositor, frequent disassembly and assembly during use of different strawberries.
  • the object of the present invention is to produce an assembly cutter / cutter holder to overcome disadvantages mentioned above and in particular allowing the use of a cutter head for all strawberries with an inner diameter greater than diameter of the cutter head.
  • the bone material detached during the operation of milling tends to form a paste and therefore remains inside the strawberry. Provide it with a cover is therefore not necessary and is even not recommended because of the risk of jamming.
  • the cutter / cutter holder assembly according to the invention has due to the radial rods of good resistance to the deformation allowing to obtain a high precision when machining the desired cavity.
  • a cutter head can be used with any cutter with an inner diameter greater than its diameter. Thanks to this, the number of tools to be sterilized is reduced, which saves time. The the number of cutter heads thus being reduced, it is easier to acquire certainty of their sterility or non sterility, which makes it possible to reduce or even eliminate the risk of fatal errors for the operated patient.
  • the bayonet is hollowed out at its center over a certain thickness to allow the radial rods thus joined to come engage in the notches of the bayonet without being subject to friction at their points of connection.
  • This recess also makes it possible to collect bone material for transplants. So the presence of connected fixing rods allowing improved stiffness of the cutter and more high milling precision, we can still collect bone material.
  • Figure 1 is a bottom view of the cutter.
  • Figure 2 shows the cutter holder and the cutter seen next to.
  • Figure 3 shows the top of the head of the cutter holder.
  • the cutter shown in Figures 1 and 2 consists a hemispherical cap 1 provided with cutting edges and two rods 2 perpendicular one to the other, length of inner diameter of the cap 1, welded together in the center of the cap, and the ends of which are welded to the inner edges of the cap 1.
  • the cutter holder shown in Figure 2 includes a strawberry handle 3, a nozzle 4, and a strawberry holder head 5.
  • the end piece 4, which is used to fix the handle 3 of the cutter holder on the rotating machine, is attached to one end of the handle 3 by a screw.
  • the head 5 of the cutter holder is also fixed to the other end of the handle with a screw.
  • the head of the cutter holder comprises a slide 6 mounted around a axis 7, one end of which is fixed to the handle of the cutter holder and the other is provided with a flange 8 in diameter greater than that of axis 7.
  • the slide 6 is pushed on axis 7 by a spring 9 which presses it against the upper flange 8 of the axis.
  • the flange 8 of the axle serves as a bayonet.
  • the handle 3 of the cutter holder is provided with a handle 13 which slides along the axis of the handle 3 of the cutter holder.
  • the number of stems could be different from four, for example three or five.
  • Locking the bayonet mount could be executed in another way.
  • the cutter head could be fixed permanently to the handle.

Landscapes

  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Claims (3)

  1. Fräserhalter und Fräser für die Chirurgie, mit einerseits einem Griff (3), an welchem ein Fräserhalterkopf (5) befestigt ist, der mit einer Verriegelungsmittel (6, 11) aufweisenden Befestigungvorrichtung vom Bajonett-Typ (10) versehen ist, und anderereits einem Fräser (1) in Form einer Kalotte, die mit radialen Stiften (2) versehen ist, welche regelmässig verteilt und fest am Innenrand des Fräsers angebracht und dazu bestimmt sind, in Schlitze (10) des Bajonetts einzugreifen, dadurch gekennzeichnet, dass die Anzahl der radialen Stifte (2) wenigstens drei beträgt und diese Stifte sich im Zentrum der Kalotte treffen, wo sie befestigt sind.
  2. Fräserhalter und Fräser nach Anspruch 1, dadurch gekennzeichnet, dass das Bajonett die Form einer Krone hat, deren Zentrum (14) auf eine bestimmte Dicke ausgehöhlt ist, um die radialen Stifte (2) des Fräsers aufzunehmen, wobei die Reibungen in Höhe ihres Verbindungspunkts verringert werden.
  3. Fräserhalter und Fräser nach Anspruch 2, dadurch gekennzeichnet, dass die Anzahl der radialen Stifte des Fräsers vier beträgt.
EP95810597A 1994-09-28 1995-09-25 Chirurgische Anordnung mit einem Fräser und einem Halter hierfür Expired - Lifetime EP0704191B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH2933/94 1994-09-28
CH02933/94A CH690021A5 (fr) 1994-09-28 1994-09-28 Ensemble porte-fraise et fraise pour la chirurgie.
CH293394 1994-09-28

Publications (2)

Publication Number Publication Date
EP0704191A1 EP0704191A1 (de) 1996-04-03
EP0704191B1 true EP0704191B1 (de) 2001-12-19

Family

ID=4244899

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95810597A Expired - Lifetime EP0704191B1 (de) 1994-09-28 1995-09-25 Chirurgische Anordnung mit einem Fräser und einem Halter hierfür

Country Status (4)

Country Link
US (1) US5658290A (de)
EP (1) EP0704191B1 (de)
CH (1) CH690021A5 (de)
DE (1) DE69524703T2 (de)

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Also Published As

Publication number Publication date
CH690021A5 (fr) 2000-03-31
US5658290A (en) 1997-08-19
DE69524703D1 (de) 2002-01-31
EP0704191A1 (de) 1996-04-03
DE69524703T2 (de) 2002-08-08

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